US specialist in modified cine lenses — converts photo glass into professional cinema optics built to cine standards.
Technical Details
Duclos modifications include the installation of standardized focus and iris gears (0.8 module), calibration for a 300° focus throw for precise focus pulling, and the integration of electronic contacts for Lens Data Systems (LDS). Typical conversions involve Canon EF, Nikon F, and Sony E-mount lenses, which are converted to PL-mount or other cinema standards. The company also produces its own lens series, such as the "DZOFilm Vespid Prime" series (25mm, 35mm, 50mm, 75mm, 100mm, 125mm) with a T2.1 aperture and a uniform 77mm front diameter.
Duclos also developed the "Lens Data System 2" (LDS-2), which transmits metadata such as focal length, aperture, and focus position in real-time to compatible cameras. Modifications are performed under cleanroom conditions and undergo a 48-point quality control.
History & Development
Matthew Duclos founded the company in 2001 in Chatsworth, California, after becoming frustrated as a camera assistant by the lack of affordable cinema lenses. In 2005, Duclos introduced the first standardized Canon EF-to-PL conversions, which were significantly cheaper than comparable original cinema lenses.
In 2012, the company developed the first LDS system for RED cameras, and in 2018, a partnership with DZOFilm followed for the in-house development of cinema lenses. Today, Duclos modifies over 2,000 lenses annually and supplies productions for Netflix, Amazon Prime, and HBO.
Practical Use in Film
Duclos-modified lenses are used in budget-conscious productions that require a cinema look without the full price tag. The Netflix series "Stranger Things" (Season 1) used modified Canon L lenses, and "The Walking Dead" utilized Duclos-converted Nikon lenses for Steadicam shots due to their lower weight.
The workflow typically involves selecting still lenses with desired optical characteristics, followed by Duclos modification and integration into existing cinema setups. Delivery time is 4-6 weeks, with costs ranging from $1,500 to $3,500 per lens.
Comparison & Alternatives
Duclos competes with GL Optics, P+S Technik, and TLS (True Lens Services) in the rehousing market. While GL Optics specializes in high-quality Zeiss conversions, Duclos focuses on affordable Canon/Nikon conversions.
Alternative approaches include adapter systems like Wooden Camera or Hot Rod Cameras, which, however, offer no mechanical improvements. For the highest demands, original cinema lenses from ARRI, Zeiss, or Cooke remain the first choice, but they cost 5-10 times more.